<?php
$server = "172.21.147.31";
$connectionInfo = array( "Database"=>"ss2g6", "UID"=>"ss2g6", "PWD"=>"group6",'ReturnDatesAsStrings'=> true  );
$conn = sqlsrv_connect( $server, $connectionInfo );

if ($conn == false){
	 die( print_r( sqlsrv_errors(), true));
}

$params = array();
$options =  array( "Scrollable" => SQLSRV_CURSOR_KEYSET );

if(isset($_GET['update'])){
    $updateCompanyName = $_GET['companyName'];
	$updateTradeName = $_GET['tradeName'];
    $sql = "SELECT * FROM Drug WHERE companyName = '$updateCompanyName' AND tradeName = '$updateTradeName'";
    $result = sqlsrv_query( $conn, $sql, $params, $options );
    $row = sqlsrv_fetch_array($result, SQLSRV_FETCH_ASSOC);

    $updateFormula = $row['formula'];
}

if(isset($_POST['Update'])){
    $updateCompanyNameOld = $_POST['companyNameOld'];
	$updateTradeNameOld = $_POST['tradeNameOld'];
    $updateCompanyName = $_POST['companyName'];
	$updateTradeName = $_POST['tradeName'];
    $updateFormula = $_POST['formula'];
    
	 if( $updateCompanyName == "" || $updateTradeName == ""){
		$validation_error = true;
	}
	else {
		$validation_error = false;
	}
	
	
    if ($validation_error ){
        $update_error = true;
    }
	
    if (!isset($update_error)){
	
	 if($updateFormula == ""){
         $sql = "UPDATE Drug SET companyName = '$updateCompanyName', tradeName = '$updateTradeName', formula = NULL WHERE companyName = '$updateCompanyNameOld' AND tradeName = '$updateTradeNameOld' ";
	
    }
    else {
        $sql = "UPDATE Drug SET companyName = '$updateCompanyName', tradeName = '$updateTradeName', formula = '$updateFormula' WHERE companyName = '$updateCompanyNameOld' AND tradeName = '$updateTradeNameOld' ";
	 }
	
    $result = sqlsrv_query( $conn, $sql, $params, $options );
    $confirm = "Drug information updated.";
	}
}

if(isset($_POST['Insert'])) {
    $companyName = $_POST['companyName'];
    $tradeName = $_POST['tradeName'];
    $formula = $_POST['formula'];
	
	/*check that the tradeName field is not empty*/
	if( $tradeName == ""){
		$validation_error = true;
	}
	else {
		$validation_error = false;
	}
	
    if($formula == ""){
         $sql = "INSERT INTO Drug VALUES ('$companyName', '$tradeName', NULL)";
    }
    else {
        $sql = "INSERT INTO Drug VALUES ('$companyName', '$tradeName', '$formula')";
    }
	
	if($validation_error == false){
		$params = array();
		$options =  array( "Scrollable" => SQLSRV_CURSOR_KEYSET );
		$result = sqlsrv_query( $conn, $sql, $params, $options );

		$confirm = "The drug information is inserted.";
	}
	else {
		$confirm = "";
	}
}

if(isset($_GET['delete'])){
	$tradeName = $_GET['tradeName'];
	$companyName = $_GET['companyName'];
	$sql = "DELETE FROM drug WHERE companyName = '". $companyName . "' AND tradeName='".$tradeName."'";
	$params = array();
    $options =  array( "Scrollable" => SQLSRV_CURSOR_KEYSET );
    $result = sqlsrv_query( $conn, $sql, $params );
	if ($result == false){
		$error = true;
	}
	else{
		$error = false;
	}
	
	
//	$rowsAffected = sqlsrv_rows_affected ($result);
	
}

if (isset($_POST['submit'])){
    $sql = $_POST['query'];
}
else
{
    $sql = "SELECT * FROM Drug";
}
$params = array();
$options =  array( "Scrollable" => SQLSRV_CURSOR_KEYSET );
$stmt = sqlsrv_query( $conn, $sql , $params, $options );
?>


<? include 'html_head.php' ?>
    <? include 'header.php' ?>

    <div class="container-fluid">
      <div class="row-fluid">
        <div class="span2">
                <? include 'sidebar.php' ?>
        </div><!--/span-->
        <div class="span9">
        <h2>Drug</h2>
        <hr>
		<?
		if(isset($_GET['delete'])){
			if ($error){ ?>
				<div class="alert alert-error">
					<? echo "Error in deleting. Foreign Key constraint violated.<br />";?>
				</div>
				
			<? 
			} 
			else { ?>
				<div class="alert alert-success">
				<? echo "Data deleted successfully."?>
				</div>
				
			<?
			} 
		}?>
		
		<?
		if(isset($_POST['Insert'])){
			if ($validation_error){ ?>
				<div class="alert alert-error">
					<? echo "Trade name of drug cannot be empty. <br />";?>
				</div>
				
			<? 
			} 
			else { ?>
				<div class="alert alert-success">
				<? echo $confirm;?>
				</div>
				
			<?
			} 
		}?>
		
		<?
			if(isset($_POST['Update'])){
				$msg = "";
				if($validation_error){
					$msg = $msg . "No text fields except 'formula'can be empty";
				}
				if(isset($error_insert) && $error_insert){
					$msg = "Data cannot be inserted, foreign key constraints or triggers violated <br />";
				}
				
				if ($msg <> ""){ ?>
					<div class="alert alert-error">
						<? echo $msg; ?>
					</div>
				<?
				}else { ?>
					<div class="alert alert-success">
					<? echo $confirm;?>
					</div>
					
				<?
				} 
			}?>
		<?
        
		if(sqlsrv_has_rows($stmt))
		{		
			$row_count = sqlsrv_num_rows($stmt);
            $colnames = sqlsrv_field_metadata($stmt)
		?>
		
		<table class="table table-striped table table-condensed">
		
		<thead>
			<tr>
			   <?
					
                    echo "<th>Company Name</th>";
					echo "<th>Trade Name</th>";
					echo "<th>Formula</th>";
					
                    
                ?>
			</tr>	
			</thead>
		<tbody>
		<?
			while( $row = sqlsrv_fetch_array( $stmt, SQLSRV_FETCH_ASSOC)){
		?>
			<tr>
				<?
					echo "<td>" . $row['companyName'] . "</td>";
					echo "<td>" . $row['tradeName'] . "</td>";
					echo "<td>" . $row['formula'] . "</td>";
					echo "<td>";
					
					$tradeName = urlencode($row['tradeName']);
					$companyName = urlencode($row['companyName']);
					echo "<td><a href='drugs.php?delete=true&tradeName=" . $tradeName . "&companyName=" . $companyName . "'>Delete</a></td>";
					echo "<td><a href='drugs.php?update=true&companyName=" . $companyName . "&tradeName=". $tradeName. "#updates'>Update</a></td>";
				
				?>
			</tr>
		  
		<?
			}
		?>
		</tbody>
		</table>
		<?
		}
		else{
			echo "<h2>No records.</h2>";
		}
		?>
          <div class="row-fluid">
            <div class="span12">
			<!-- Update, appears only if update or update_error is set -->
            <? if (isset($_GET['update'])  || isset($update_error)){ ?>
            <div>
                <a name="updates"></a><h3>Update Drug information:</h3> 
                   <form method="post" action="drugs.php" class="well form-horizontal">
                    <input type="hidden" name="companyNameOld" value="<? echo $updateCompanyName ?>" />
                    <input type="hidden" name="tradeNameOld" value="<? echo $updateTradeName ?>" /> 
					 <div class="control-group">
                        <label class="control-label">Company Name</label>
                        <div class="controls">
                            <? 
								$sql2 = "SELECT companyName FROM PharmaceuticalCompany order by companyName ASC";
								$result = sqlsrv_query($conn,$sql2);
								echo "<select name = 'companyName'>";
								while ($data=sqlsrv_fetch_array($result, SQLSRV_FETCH_ASSOC)){
                                    echo "<option";
                                    if ($data['companyName'] == $updateCompanyName){
                                        echo " selected=selected";
                                    }
                                    echo ">";
									echo $data['companyName']; 
									echo "</option>";
								}
								echo "</select>";
							?>
							<span class="help-inline"><a href="pharmaceutical.php" target="_blank">Create new PharmaceuticalCompany</a></span>
                        </div> 
                    </div>
                    <div class="control-group">
                        <label class="control-label">Trade Name</label>
                        <div class="controls">
                            <input type="text" name="tradeName" id="tradeName" value="<? echo $updateTradeName; ?>"/>
                        </div>
                    </div>
                    <div class="control-group">
                        <label class="control-label">Formula</label>
                        <div class="controls">
                            <input type="text" name="formula" id="formula" value="<? echo $updateFormula; ?>"/>
                        </div>
                    </div>
                    <div class="form-actions">
                        <input type="submit" name="Update" value="Update"  class="btn btn-primary"/>
                    </div> 
                    </form>   
            </div>
            <? } ?>
            <h3>Create a new Drug information:</h3> 
                    <form method="post" action="drugs.php" class="well form-horizontal">
                    <div class="control-group">
                        <label class="control-label">Company Name</label>
                        <div class="controls">
                        	<? 
								$sql2 = "SELECT companyName FROM PharmaceuticalCompany order by companyName ASC";
								$result = sqlsrv_query($conn,$sql2);
								echo "<select name = 'companyName'>";
								while ($data=sqlsrv_fetch_array($result, SQLSRV_FETCH_ASSOC)){
									echo "<option>";
									echo $data['companyName']; 
									echo "</option>";
								}
								echo "</select>";
							?>
                            <!--<input type="text" name="companyName" id="companyName" placeholder="eg. Alibaba Medical Centre" />-->
                            <span class="help-inline"><a href="pharmaceutical.php" target="_blank">Create new PharmaceuticalCompany</a></span>
                        </div>
                    </div>
                    <div class="control-group">
                        <label class="control-label">Trade Name</label>
                        <div class="controls">
                            <input type="text" name="tradeName" id="tradeName" placeholder="eg. Panadol" />
                        </div> 
                    </div>
                    <div class="control-group">
                        <label class="control-label">Formula</label>
                        <div class="controls">
                            <input type="text" name="formula" id="formula" placeholder="eg. C9-H12-019-N17" />
                        </div>
                    </div>
                    <div class="form-actions">
                        <input type="submit" name="Insert" value="Insert"  class="btn btn-primary"/>
                    </div> 
                    </form>
              <h3>Enter your query:</h3>
                    <form method="post" action="custom.php" class="well form-inline">
                    <div class="control-group">
                        <div class="controls">
                            <textarea name="query" class="span10" id="textarea" rows="5" placeholder = 'SQL query'></textarea>
                        </div>
                    </div>
                    <p>
                    <p><input type="submit" name="submit" class="btn btn-primary" href="#" /></p>
                    </form>
                    
            </div><!--/span-->
          </div><!--/row-->
        </div><!--/span-->
      </div><!--/row-->

      <hr>

      <footer>
        <p>&copy; SS2 GROUP 6 </p>
      </footer>

    </div><!--/.fluid-container-->
  </body>
</html>
